[FIR] Use default language settings in inference components

Without settings common inference components require additional parameters
to be passed explicitly from components not shared between FIR and FE10.
Proper configuration can be postponed in FIR, defaults are good enough for now.

^KT-42080 In progress

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/inference/ConstraintSystemCompleter.kt

@@ -30,8 +30,10 @@ import org.jetbrains.kotlin.utils.addIfNotNull
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 class ConstraintSystemCompleter(private val components: BodyResolveComponents) {
-    val inferenceComponents = components.session.inferenceComponents
-    val variableFixationFinder = VariableFixationFinder(inferenceComponents.trivialConstraintTypeInferenceOracle)
+    private val inferenceComponents
+        get() = components.session.inferenceComponents
+    val variableFixationFinder
+        get() = inferenceComponents.variableFixationFinder
 
     fun complete(
         c: ConstraintSystemCompletionContext,
@@ -50,7 +52,7 @@ class ConstraintSystemCompleter(private val components: BodyResolveComponents) {
             val postponedAtoms = getOrderedNotAnalyzedPostponedArguments(topLevelAtoms)
             val variableForFixation =
                 variableFixationFinder.findFirstVariableForFixation(
-                    c, allTypeVariables, postponedAtoms, completionMode, candidateReturnType, inferenceCompatibilityMode = true
+                    c, allTypeVariables, postponedAtoms, completionMode, candidateReturnType
                 ) ?: break
 
             if (

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/inference/InferenceComponents.kt

@@ -5,22 +5,21 @@
 
 package org.jetbrains.kotlin.fir.resolve.inference
 
+import org.jetbrains.kotlin.config.LanguageVersionSettings
+import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
 import org.jetbrains.kotlin.fir.FirSession
 import org.jetbrains.kotlin.fir.FirSessionComponent
 import org.jetbrains.kotlin.fir.NoMutableState
 import org.jetbrains.kotlin.fir.types.ConeInferenceContext
 import org.jetbrains.kotlin.fir.types.ConeTypeCheckerContext
-import org.jetbrains.kotlin.resolve.calls.inference.InferenceCompatibilityChecker
-import org.jetbrains.kotlin.resolve.calls.inference.components.ConstraintIncorporator
-import org.jetbrains.kotlin.resolve.calls.inference.components.ConstraintInjector
-import org.jetbrains.kotlin.resolve.calls.inference.components.ResultTypeResolver
-import org.jetbrains.kotlin.resolve.calls.inference.components.TrivialConstraintTypeInferenceOracle
+import org.jetbrains.kotlin.resolve.calls.inference.components.*
 import org.jetbrains.kotlin.resolve.calls.inference.model.NewConstraintSystemImpl
 import org.jetbrains.kotlin.types.AbstractTypeApproximator
 
 @NoMutableState
 class InferenceComponents(val session: FirSession) : FirSessionComponent {
     val ctx: ConeTypeCheckerContext = ConeTypeCheckerContext(isErrorTypeEqualsToAnything = false, isStubTypeEqualsToAnything = false, session)
+    val languageVersionSettings: LanguageVersionSettings = LanguageVersionSettingsImpl.DEFAULT // TODO
 
     val approximator: AbstractTypeApproximator = object : AbstractTypeApproximator(ctx) {}
     val trivialConstraintTypeInferenceOracle = TrivialConstraintTypeInferenceOracle.create(ctx)
@@ -28,14 +27,14 @@ class InferenceComponents(val session: FirSession) : FirSessionComponent {
     private val injector = ConstraintInjector(
         incorporator,
         approximator,
-        object : InferenceCompatibilityChecker {
-            override val isCompatibilityModeEnabled = true
-        }
+        languageVersionSettings,
     )
     val resultTypeResolver = ResultTypeResolver(approximator, trivialConstraintTypeInferenceOracle)
 
     val constraintSystemFactory = ConstraintSystemFactory()
 
+    val variableFixationFinder = VariableFixationFinder(trivialConstraintTypeInferenceOracle, languageVersionSettings)
+
     fun createConstraintSystem(): NewConstraintSystemImpl {
         return NewConstraintSystemImpl(injector, ctx)
     }

compiler/frontend/src/org/jetbrains/kotlin/resolve/PlatformConfiguratorBase.kt

@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.resolve
 import org.jetbrains.kotlin.builtins.PlatformToKotlinClassMapper
 import org.jetbrains.kotlin.container.*
 import org.jetbrains.kotlin.resolve.calls.checkers.*
-import org.jetbrains.kotlin.resolve.calls.inference.InferenceCompatibilityCheckerImpl
 import org.jetbrains.kotlin.resolve.calls.results.TypeSpecificityComparator
 import org.jetbrains.kotlin.resolve.checkers.*
 import org.jetbrains.kotlin.resolve.lazy.DelegationFilter
@@ -110,7 +109,6 @@ abstract class PlatformConfiguratorBase(
 
     override fun configureModuleDependentCheckers(container: StorageComponentContainer) {
         container.useImpl<ExperimentalMarkerDeclarationAnnotationChecker>()
-        container.useImpl<InferenceCompatibilityCheckerImpl>()
     }
 
     fun configureExtensionsAndCheckers(container: StorageComponentContainer) {

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/inference/CoroutineInferenceSession.kt

@@ -82,12 +82,9 @@ class CoroutineInferenceSession(
         return !storage.notFixedTypeVariables.keys.any {
             val variable = storage.allTypeVariables[it]
             val isPostponed = variable != null && variable in storage.postponedTypeVariables
-            val useInferenceCompatibilityMode =
-                topLevelCallContext.languageVersionSettings.supportsFeature(LanguageFeature.InferenceCompatibility)
             !isPostponed && !kotlinConstraintSystemCompleter.variableFixationFinder.isTypeVariableHasProperConstraint(
                 system,
                 it,
-                useInferenceCompatibilityMode
             )
         } || candidate.getSubResolvedAtoms().any { it.hasPostponed() }
     }

compiler/resolution.common/build.gradle.kts

@@ -5,6 +5,7 @@ plugins {
 
 dependencies {
     api(project(":core:compiler.common"))
+    api(project(":compiler:util"))
 }
 
 sourceSets {

compiler/resolution.common/src/org/jetbrains/kotlin/resolve/calls/inference/InferenceCompatibilityChecker.kt

@@ -1,10 +0,0 @@
-/*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.resolve.calls.inference
-
-interface InferenceCompatibilityChecker {
-    val isCompatibilityModeEnabled: Boolean
-}

compiler/resolution.common/src/org/jetbrains/kotlin/resolve/calls/inference/components/ConstraintInjector.kt

@@ -6,8 +6,9 @@
 package org.jetbrains.kotlin.resolve.calls.inference.components
 
 
+import org.jetbrains.kotlin.config.LanguageFeature
+import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.resolve.calls.inference.ConstraintSystemOperation
-import org.jetbrains.kotlin.resolve.calls.inference.InferenceCompatibilityChecker
 import org.jetbrains.kotlin.resolve.calls.inference.model.*
 import org.jetbrains.kotlin.resolve.calls.inference.model.ConstraintKind.*
 import org.jetbrains.kotlin.types.AbstractTypeApproximator
@@ -21,7 +22,7 @@ import kotlin.math.max
 class ConstraintInjector(
     val constraintIncorporator: ConstraintIncorporator,
     val typeApproximator: AbstractTypeApproximator,
-    val inferenceCompatibilityChecker: InferenceCompatibilityChecker
+    private val languageVersionSettings: LanguageVersionSettings,
 ) {
     private val ALLOWED_DEPTH_DELTA_FOR_INCORPORATION = 1
 
@@ -131,7 +132,7 @@ class ConstraintInjector(
         // We use `var` intentionally to avoid extra allocations as this property is quite "hot"
         private var possibleNewConstraints: MutableList<Pair<TypeVariableMarker, Constraint>>? = null
 
-        override val isInferenceCompatibilityEnabled = inferenceCompatibilityChecker.isCompatibilityModeEnabled
+        override val isInferenceCompatibilityEnabled = languageVersionSettings.supportsFeature(LanguageFeature.InferenceCompatibility)
 
         private var baseLowerType = position.initialConstraint.a
         private var baseUpperType = position.initialConstraint.b

compiler/resolution.common/src/org/jetbrains/kotlin/resolve/calls/inference/components/VariableFixationFinder.kt

@@ -5,6 +5,8 @@
 
 package org.jetbrains.kotlin.resolve.calls.inference.components
 
+import org.jetbrains.kotlin.config.LanguageFeature
+import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.resolve.calls.inference.components.ConstraintSystemCompletionMode.PARTIAL
 import org.jetbrains.kotlin.resolve.calls.inference.model.Constraint
 import org.jetbrains.kotlin.resolve.calls.inference.model.DeclaredUpperBoundConstraintPosition
@@ -13,7 +15,8 @@ import org.jetbrains.kotlin.resolve.calls.model.PostponedResolvedAtomMarker
 import org.jetbrains.kotlin.types.model.*
 
 class VariableFixationFinder(
-    private val trivialConstraintTypeInferenceOracle: TrivialConstraintTypeInferenceOracle
+    private val trivialConstraintTypeInferenceOracle: TrivialConstraintTypeInferenceOracle,
+    private val languageVersionSettings: LanguageVersionSettings,
 ) {
     interface Context : TypeSystemInferenceExtensionContext {
         val notFixedTypeVariables: Map<TypeConstructorMarker, VariableWithConstraints>
@@ -33,9 +36,7 @@ class VariableFixationFinder(
         postponedKtPrimitives: List<PostponedResolvedAtomMarker>,
         completionMode: ConstraintSystemCompletionMode,
         topLevelType: KotlinTypeMarker,
-        inferenceCompatibilityMode: Boolean = false,
-    ): VariableForFixation? =
-        c.findTypeVariableForFixation(allTypeVariables, postponedKtPrimitives, completionMode, topLevelType, inferenceCompatibilityMode)
+    ): VariableForFixation? = c.findTypeVariableForFixation(allTypeVariables, postponedKtPrimitives, completionMode, topLevelType)
 
     enum class TypeVariableFixationReadiness {
         FORBIDDEN,
@@ -50,10 +51,12 @@ class VariableFixationFinder(
         READY_FOR_FIXATION_REIFIED,
     }
 
+    private val inferenceCompatibilityModeEnabled: Boolean
+        get() = languageVersionSettings.supportsFeature(LanguageFeature.InferenceCompatibility)
+
     private fun Context.getTypeVariableReadiness(
         variable: TypeConstructorMarker,
         dependencyProvider: TypeVariableDependencyInformationProvider,
-        inferenceCompatibilityMode: Boolean
     ): TypeVariableFixationReadiness = when {
         !notFixedTypeVariables.contains(variable) ||
                 dependencyProvider.isVariableRelatedToTopLevelType(variable) -> TypeVariableFixationReadiness.FORBIDDEN
@@ -64,7 +67,7 @@ class VariableFixationFinder(
         variableHasOnlyIncorporatedConstraintsFromDeclaredUpperBound(variable) ->
             TypeVariableFixationReadiness.FROM_INCORPORATION_OF_DECLARED_UPPER_BOUND
         isReified(variable) -> TypeVariableFixationReadiness.READY_FOR_FIXATION_REIFIED
-        inferenceCompatibilityMode -> {
+        inferenceCompatibilityModeEnabled -> {
             when {
                 variableHasLowerProperConstraint(variable) -> TypeVariableFixationReadiness.READY_FOR_FIXATION_LOWER
                 else -> TypeVariableFixationReadiness.READY_FOR_FIXATION_UPPER
@@ -76,13 +79,12 @@ class VariableFixationFinder(
     fun isTypeVariableHasProperConstraint(
         context: Context,
         typeVariable: TypeConstructorMarker,
-        inferenceCompatibilityMode: Boolean = false
     ): Boolean {
         return with(context) {
             val dependencyProvider = TypeVariableDependencyInformationProvider(
                 notFixedTypeVariables, emptyList(), topLevelType = null, context
             )
-            when (getTypeVariableReadiness(typeVariable, dependencyProvider, inferenceCompatibilityMode)) {
+            when (getTypeVariableReadiness(typeVariable, dependencyProvider)) {
                 TypeVariableFixationReadiness.FORBIDDEN, TypeVariableFixationReadiness.WITHOUT_PROPER_ARGUMENT_CONSTRAINT -> false
                 else -> true
             }
@@ -107,7 +109,6 @@ class VariableFixationFinder(
         postponedArguments: List<PostponedResolvedAtomMarker>,
         completionMode: ConstraintSystemCompletionMode,
         topLevelType: KotlinTypeMarker,
-        inferenceCompatibilityMode: Boolean,
     ): VariableForFixation? {
         if (allTypeVariables.isEmpty()) return null
 
@@ -116,9 +117,9 @@ class VariableFixationFinder(
         )
 
         val candidate =
-            allTypeVariables.maxByOrNull { getTypeVariableReadiness(it, dependencyProvider, inferenceCompatibilityMode) } ?: return null
+            allTypeVariables.maxByOrNull { getTypeVariableReadiness(it, dependencyProvider) } ?: return null
 
-        return when (getTypeVariableReadiness(candidate, dependencyProvider, inferenceCompatibilityMode)) {
+        return when (getTypeVariableReadiness(candidate, dependencyProvider)) {
             TypeVariableFixationReadiness.FORBIDDEN -> null
             TypeVariableFixationReadiness.WITHOUT_PROPER_ARGUMENT_CONSTRAINT -> VariableForFixation(candidate, false)
             TypeVariableFixationReadiness.WITH_TRIVIAL_OR_NON_PROPER_CONSTRAINTS ->

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/inference/InferenceCompatibilityCheckerImpl.kt

@@ -1,14 +0,0 @@
-/*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.resolve.calls.inference
-
-import org.jetbrains.kotlin.config.LanguageFeature
-import org.jetbrains.kotlin.config.LanguageVersionSettings
-
-class InferenceCompatibilityCheckerImpl(val languageVersionSettings: LanguageVersionSettings) : InferenceCompatibilityChecker {
-    override val isCompatibilityModeEnabled: Boolean
-        get() = languageVersionSettings.getFeatureSupport(LanguageFeature.InferenceCompatibility) == LanguageFeature.State.ENABLED
-}

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/inference/components/KotlinConstraintSystemCompleter.kt

@@ -5,8 +5,6 @@
 
 package org.jetbrains.kotlin.resolve.calls.inference.components
 
-import org.jetbrains.kotlin.config.LanguageFeature
-import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.resolve.calls.components.transformToResolvedLambda
 import org.jetbrains.kotlin.resolve.calls.inference.model.*
 import org.jetbrains.kotlin.resolve.calls.model.*
@@ -21,7 +19,6 @@ import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 class KotlinConstraintSystemCompleter(
     private val resultTypeResolver: ResultTypeResolver,
     val variableFixationFinder: VariableFixationFinder,
-    val languageVersionSettings: LanguageVersionSettings,
 ) {
     private val postponedArgumentInputTypesResolver = PostponedArgumentInputTypesResolver(resultTypeResolver, variableFixationFinder)
 
@@ -108,7 +105,6 @@ class KotlinConstraintSystemCompleter(
                         topLevelType,
                         topLevelAtoms,
                         dependencyProvider,
-                        inferenceCompatibilityMode = isInferenceCompatibilityModeEnabled(),
                     )
 
                     if (wasFixedSomeVariable)
@@ -262,7 +258,6 @@ class KotlinConstraintSystemCompleter(
                 postponedArguments,
                 completionMode,
                 topLevelType,
-                inferenceCompatibilityMode = isInferenceCompatibilityModeEnabled(),
             ) ?: break
 
             if (!variableForFixation.hasProperConstraint && completionMode == ConstraintSystemCompletionMode.PARTIAL)
@@ -373,12 +368,8 @@ class KotlinConstraintSystemCompleter(
         postponedArguments,
         completionMode,
         topLevelType,
-        inferenceCompatibilityMode = isInferenceCompatibilityModeEnabled(),
     ) != null
 
-    private fun isInferenceCompatibilityModeEnabled(): Boolean =
-        languageVersionSettings.supportsFeature(LanguageFeature.InferenceCompatibility)
-
     companion object {
         fun getOrderedNotAnalyzedPostponedArguments(topLevelAtoms: List<ResolvedAtom>): List<PostponedResolvedAtom> {
             fun ResolvedAtom.process(to: MutableList<PostponedResolvedAtom>) {

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/inference/components/PostponedArgumentInputTypesResolver.kt

@@ -455,7 +455,6 @@ class PostponedArgumentInputTypesResolver(
         topLevelType: UnwrappedType,
         topLevelAtoms: List<ResolvedAtom>,
         dependencyProvider: TypeVariableDependencyInformationProvider,
-        inferenceCompatibilityMode: Boolean = false,
     ): Boolean {
         val expectedType = argument.run { safeAs<PostponedAtomWithRevisableExpectedType>()?.revisedExpectedType ?: expectedType }
 
@@ -467,7 +466,6 @@ class PostponedArgumentInputTypesResolver(
                     topLevelType,
                     topLevelAtoms,
                     dependencyProvider,
-                    inferenceCompatibilityMode
                 )
 
             if (wasFixedSomeVariable)
@@ -483,12 +481,11 @@ class PostponedArgumentInputTypesResolver(
         topLevelType: UnwrappedType,
         topLevelAtoms: List<ResolvedAtom>,
         dependencyProvider: TypeVariableDependencyInformationProvider,
-        inferenceCompatibilityMode: Boolean,
     ): Boolean {
         val relatedVariables = type.getPureArgumentsForFunctionalTypeOrSubtype()
             .flatMap { getAllDeeplyRelatedTypeVariables(it, dependencyProvider) }
         val variableForFixation = variableFixationFinder.findFirstVariableForFixation(
-            this, relatedVariables, postponedArguments, ConstraintSystemCompletionMode.FULL, topLevelType, inferenceCompatibilityMode
+            this, relatedVariables, postponedArguments, ConstraintSystemCompletionMode.FULL, topLevelType
         )
 
         if (variableForFixation == null || !variableForFixation.hasProperConstraint)

idea/idea-analysis/src/org/jetbrains/kotlin/caches/resolve/CompositeResolverForModuleFactory.kt

@@ -23,7 +23,6 @@ import org.jetbrains.kotlin.frontend.di.configureStandardResolveComponents
 import org.jetbrains.kotlin.frontend.java.di.configureJavaSpecificComponents
 import org.jetbrains.kotlin.frontend.java.di.initializeJavaSpecificComponents
 import org.jetbrains.kotlin.idea.project.IdeaEnvironment
-import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.load.java.lazy.ModuleClassResolver
 import org.jetbrains.kotlin.load.java.lazy.ModuleClassResolverImpl
 import org.jetbrains.kotlin.load.kotlin.PackagePartProvider
@@ -36,7 +35,6 @@ import org.jetbrains.kotlin.platform.jvm.JvmPlatform
 import org.jetbrains.kotlin.platform.konan.NativePlatform
 import org.jetbrains.kotlin.platform.konan.NativePlatforms
 import org.jetbrains.kotlin.resolve.*
-import org.jetbrains.kotlin.resolve.calls.inference.InferenceCompatibilityCheckerImpl
 import org.jetbrains.kotlin.resolve.checkers.ExperimentalMarkerDeclarationAnnotationChecker
 import org.jetbrains.kotlin.resolve.jvm.JavaDescriptorResolver
 import org.jetbrains.kotlin.resolve.jvm.JvmPlatformParameters
@@ -254,6 +252,5 @@ class CompositePlatformConigurator(private val componentConfigurators: List<Plat
         // Unfortunately, it is declared in base class, so repeating call to 'configureModuleDependentCheckers' will lead
         // to multiple registrrations.
         container.useImpl<ExperimentalMarkerDeclarationAnnotationChecker>()
-        container.useImpl<InferenceCompatibilityCheckerImpl>()
     }
 }